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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ParamParser.Param.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.cli;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Function;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.base.Predicate;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.google.common.collect.Iterables;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.ArrayList;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.Arrays;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.HashMap;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.LinkedHashSet;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.List;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.Map;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.Set;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.regex.Matcher;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.regex.Pattern;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.dellroad.stuff.java.Primitive;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.jsimpledb.parse.ParseContext;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.jsimpledb.parse.ParseException;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.jsimpledb.parse.ParseSession;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.jsimpledb.parse.ParseUtil;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.jsimpledb.parse.Parser;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.jsimpledb.parse.SpaceParser;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.jsimpledb.parse.WordParser;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>/**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Parses command line parameters, including optional flags, based on a specification string.<a name="line.34"></a>
<span class="sourceLineNo">035</span> *<a name="line.35"></a>
<span class="sourceLineNo">036</span> * &lt;p&gt;<a name="line.36"></a>
<span class="sourceLineNo">037</span> * The specification string contains whitespace-separated parameter specifications; see {@link Param} for syntax.<a name="line.37"></a>
<span class="sourceLineNo">038</span> * &lt;/p&gt;<a name="line.38"></a>
<span class="sourceLineNo">039</span> */<a name="line.39"></a>
<span class="sourceLineNo">040</span>public class ParamParser implements Parser&lt;Map&lt;String, Object&gt;&gt; {<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>    private final LinkedHashSet&lt;Param&gt; optionFlags = new LinkedHashSet&lt;&gt;();<a name="line.42"></a>
<span class="sourceLineNo">043</span>    private final ArrayList&lt;Param&gt; params = new ArrayList&lt;&gt;();<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>    public ParamParser(String spec) {<a name="line.45"></a>
<span class="sourceLineNo">046</span>        if (spec.length() &gt; 0) {<a name="line.46"></a>
<span class="sourceLineNo">047</span>            for (String pspec : spec.split("\\s+")) {<a name="line.47"></a>
<span class="sourceLineNo">048</span>                final Param param = new Param(pspec);<a name="line.48"></a>
<span class="sourceLineNo">049</span>                if (param.isOption())<a name="line.49"></a>
<span class="sourceLineNo">050</span>                    this.optionFlags.add(param);<a name="line.50"></a>
<span class="sourceLineNo">051</span>                else<a name="line.51"></a>
<span class="sourceLineNo">052</span>                    this.params.add(param);<a name="line.52"></a>
<span class="sourceLineNo">053</span>            }<a name="line.53"></a>
<span class="sourceLineNo">054</span>        }<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    /**<a name="line.57"></a>
<span class="sourceLineNo">058</span>     * Build a usage summary string.<a name="line.58"></a>
<span class="sourceLineNo">059</span>     *<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * @param commandName command name<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * @return usage string<a name="line.61"></a>
<span class="sourceLineNo">062</span>     */<a name="line.62"></a>
<span class="sourceLineNo">063</span>    public String getUsage(String commandName) {<a name="line.63"></a>
<span class="sourceLineNo">064</span>        final StringBuilder buf = new StringBuilder(commandName);<a name="line.64"></a>
<span class="sourceLineNo">065</span>        for (Param param : this.optionFlags) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>            buf.append(" [").append(param.getOptionFlag());<a name="line.66"></a>
<span class="sourceLineNo">067</span>            if (param.getTypeName() != null)<a name="line.67"></a>
<span class="sourceLineNo">068</span>                buf.append(' ').append(param.getName());<a name="line.68"></a>
<span class="sourceLineNo">069</span>            buf.append(']');<a name="line.69"></a>
<span class="sourceLineNo">070</span>        }<a name="line.70"></a>
<span class="sourceLineNo">071</span>        for (Param param : this.params) {<a name="line.71"></a>
<span class="sourceLineNo">072</span>            buf.append(' ');<a name="line.72"></a>
<span class="sourceLineNo">073</span>            if (param.getMin() == 0)<a name="line.73"></a>
<span class="sourceLineNo">074</span>                buf.append('[');<a name="line.74"></a>
<span class="sourceLineNo">075</span>            buf.append(param.getName());<a name="line.75"></a>
<span class="sourceLineNo">076</span>            if (param.getMax() &gt; 1)<a name="line.76"></a>
<span class="sourceLineNo">077</span>                buf.append(" ...");<a name="line.77"></a>
<span class="sourceLineNo">078</span>            if (param.getMin() == 0)<a name="line.78"></a>
<span class="sourceLineNo">079</span>                buf.append(']');<a name="line.79"></a>
<span class="sourceLineNo">080</span>        }<a name="line.80"></a>
<span class="sourceLineNo">081</span>        return buf.toString();<a name="line.81"></a>
<span class="sourceLineNo">082</span>    }<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>    /**<a name="line.84"></a>
<span class="sourceLineNo">085</span>     * Get option flags.<a name="line.85"></a>
<span class="sourceLineNo">086</span>     *<a name="line.86"></a>
<span class="sourceLineNo">087</span>     * @return optional parameters<a name="line.87"></a>
<span class="sourceLineNo">088</span>     */<a name="line.88"></a>
<span class="sourceLineNo">089</span>    public Set&lt;Param&gt; getOptionFlags() {<a name="line.89"></a>
<span class="sourceLineNo">090</span>        return this.optionFlags;<a name="line.90"></a>
<span class="sourceLineNo">091</span>    }<a name="line.91"></a>
<span class="sourceLineNo">092</span><a name="line.92"></a>
<span class="sourceLineNo">093</span>    /**<a name="line.93"></a>
<span class="sourceLineNo">094</span>     * Get regular parameters, in expected order.<a name="line.94"></a>
<span class="sourceLineNo">095</span>     *<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * @return mandatory parameters<a name="line.96"></a>
<span class="sourceLineNo">097</span>     */<a name="line.97"></a>
<span class="sourceLineNo">098</span>    public List&lt;Param&gt; getParameters() {<a name="line.98"></a>
<span class="sourceLineNo">099</span>        return this.params;<a name="line.99"></a>
<span class="sourceLineNo">100</span>    }<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
<span class="sourceLineNo">102</span>    /**<a name="line.102"></a>
<span class="sourceLineNo">103</span>     * Convert parameter spec type name into a {@link Parser}.<a name="line.103"></a>
<span class="sourceLineNo">104</span>     *<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * &lt;p&gt;<a name="line.105"></a>
<span class="sourceLineNo">106</span>     * The implementation in {@link ParamParser} supports the Java primitive types, and<a name="line.106"></a>
<span class="sourceLineNo">107</span>     * {@code word} for a {@link String} containing one or more non-whitespace characters.<a name="line.107"></a>
<span class="sourceLineNo">108</span>     * Subclasses should override as required to add additional supported types.<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * &lt;/p&gt;<a name="line.109"></a>
<span class="sourceLineNo">110</span>     *<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * @param typeName name of type<a name="line.111"></a>
<span class="sourceLineNo">112</span>     * @return parser for parameters of the specified type<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * @throws IllegalArgumentException if {@code typeName} is unknown<a name="line.113"></a>
<span class="sourceLineNo">114</span>     */<a name="line.114"></a>
<span class="sourceLineNo">115</span>    protected Parser&lt;?&gt; getParser(String typeName) {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        if (typeName == null)<a name="line.116"></a>
<span class="sourceLineNo">117</span>            throw new IllegalArgumentException("null typeName");<a name="line.117"></a>
<span class="sourceLineNo">118</span>        if (typeName.equals("word"))<a name="line.118"></a>
<span class="sourceLineNo">119</span>            return new WordParser("parameter");<a name="line.119"></a>
<span class="sourceLineNo">120</span>        for (Primitive&lt;?&gt; prim : Primitive.values()) {<a name="line.120"></a>
<span class="sourceLineNo">121</span>            if (prim == Primitive.VOID)<a name="line.121"></a>
<span class="sourceLineNo">122</span>                continue;<a name="line.122"></a>
<span class="sourceLineNo">123</span>            if (typeName.equals(prim.getName()))<a name="line.123"></a>
<span class="sourceLineNo">124</span>                return this.createPrimitiveParser(prim);<a name="line.124"></a>
<span class="sourceLineNo">125</span>        }<a name="line.125"></a>
<span class="sourceLineNo">126</span>        throw new IllegalArgumentException("unknown parameter type `" + typeName + "'");<a name="line.126"></a>
<span class="sourceLineNo">127</span>    }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>    // This method exists solely to bind the generic type parameters<a name="line.129"></a>
<span class="sourceLineNo">130</span>    private &lt;T&gt; Parser&lt;T&gt; createPrimitiveParser(final Primitive&lt;T&gt; prim) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>        return new Parser&lt;T&gt;() {<a name="line.131"></a>
<span class="sourceLineNo">132</span>            @Override<a name="line.132"></a>
<span class="sourceLineNo">133</span>            public T parse(ParseSession session, ParseContext ctx, boolean complete) {<a name="line.133"></a>
<span class="sourceLineNo">134</span>                try {<a name="line.134"></a>
<span class="sourceLineNo">135</span>                    return prim.parseValue(ctx.matchPrefix("[^\\s]+").group());<a name="line.135"></a>
<span class="sourceLineNo">136</span>                } catch (IllegalArgumentException e) {<a name="line.136"></a>
<span class="sourceLineNo">137</span>                    throw new ParseException(ctx, "invalid " + prim.getName() + " value", e);<a name="line.137"></a>
<span class="sourceLineNo">138</span>                }<a name="line.138"></a>
<span class="sourceLineNo">139</span>            }<a name="line.139"></a>
<span class="sourceLineNo">140</span>        };<a name="line.140"></a>
<span class="sourceLineNo">141</span>    }<a name="line.141"></a>
<span class="sourceLineNo">142</span><a name="line.142"></a>
<span class="sourceLineNo">143</span>    /**<a name="line.143"></a>
<span class="sourceLineNo">144</span>     * Parse command line parameters.<a name="line.144"></a>
<span class="sourceLineNo">145</span>     *<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * @param session associated session<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * @param ctx parse context positioned at whitespace preceeding parameters (if any)<a name="line.147"></a>
<span class="sourceLineNo">148</span>     * @param complete true if we're only determining completions<a name="line.148"></a>
<span class="sourceLineNo">149</span>     * @throws ParseException if parse fails<a name="line.149"></a>
<span class="sourceLineNo">150</span>     */<a name="line.150"></a>
<span class="sourceLineNo">151</span>    @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span>    public Map&lt;String, Object&gt; parse(ParseSession session, ParseContext ctx, boolean complete) {<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span>        // Store results here<a name="line.154"></a>
<span class="sourceLineNo">155</span>        final HashMap&lt;String, Object&gt; values = new HashMap&lt;String, Object&gt;();<a name="line.155"></a>
<span class="sourceLineNo">156</span><a name="line.156"></a>
<span class="sourceLineNo">157</span>        // First parse options<a name="line.157"></a>
<span class="sourceLineNo">158</span>        boolean needSpace = !this.params.isEmpty() &amp;&amp; this.params.get(0).getMin() &gt; 0;<a name="line.158"></a>
<span class="sourceLineNo">159</span>        while (true) {<a name="line.159"></a>
<span class="sourceLineNo">160</span>            new SpaceParser(needSpace).parse(ctx, complete);<a name="line.160"></a>
<span class="sourceLineNo">161</span>            needSpace = false;<a name="line.161"></a>
<span class="sourceLineNo">162</span>            if (ctx.getInput().matches("(?s)^--([\\s;].*)?$")) {<a name="line.162"></a>
<span class="sourceLineNo">163</span>                ctx.setIndex(ctx.getIndex() + 2);<a name="line.163"></a>
<span class="sourceLineNo">164</span>                needSpace = !this.params.isEmpty() &amp;&amp; this.params.get(0).getMin() &gt; 0;<a name="line.164"></a>
<span class="sourceLineNo">165</span>                break;<a name="line.165"></a>
<span class="sourceLineNo">166</span>            }<a name="line.166"></a>
<span class="sourceLineNo">167</span>            final Matcher matcher = ctx.tryPattern("(-[^\\s;]+)");<a name="line.167"></a>
<span class="sourceLineNo">168</span>            if (matcher == null)<a name="line.168"></a>
<span class="sourceLineNo">169</span>                break;<a name="line.169"></a>
<span class="sourceLineNo">170</span>            final String option = matcher.group(1);<a name="line.170"></a>
<span class="sourceLineNo">171</span>            final Param param = Iterables.find(this.optionFlags, new Predicate&lt;Param&gt;() {<a name="line.171"></a>
<span class="sourceLineNo">172</span>                @Override<a name="line.172"></a>
<span class="sourceLineNo">173</span>                public boolean apply(Param param) {<a name="line.173"></a>
<span class="sourceLineNo">174</span>                    return option.equals(param.getOptionFlag());<a name="line.174"></a>
<span class="sourceLineNo">175</span>                }<a name="line.175"></a>
<span class="sourceLineNo">176</span>            }, null);<a name="line.176"></a>
<span class="sourceLineNo">177</span>            if (param == null) {<a name="line.177"></a>
<span class="sourceLineNo">178</span>                throw new ParseException(ctx, "unrecognized option `" + option + "'").addCompletions(<a name="line.178"></a>
<span class="sourceLineNo">179</span>                  ParseUtil.complete(Iterables.transform(this.optionFlags, new Function&lt;Param, String&gt;() {<a name="line.179"></a>
<span class="sourceLineNo">180</span>                    @Override<a name="line.180"></a>
<span class="sourceLineNo">181</span>                    public String apply(Param param) {<a name="line.181"></a>
<span class="sourceLineNo">182</span>                        return param.getOptionFlag();<a name="line.182"></a>
<span class="sourceLineNo">183</span>                    }<a name="line.183"></a>
<span class="sourceLineNo">184</span>                }), option));<a name="line.184"></a>
<span class="sourceLineNo">185</span>            }<a name="line.185"></a>
<span class="sourceLineNo">186</span>            final Parser&lt;?&gt; parser = param.getParser();<a name="line.186"></a>
<span class="sourceLineNo">187</span>            if (parser != null) {<a name="line.187"></a>
<span class="sourceLineNo">188</span>                new SpaceParser(true).parse(ctx, complete);<a name="line.188"></a>
<span class="sourceLineNo">189</span>                values.put(param.getName(), parser.parse(session, ctx, complete));<a name="line.189"></a>
<span class="sourceLineNo">190</span>            } else<a name="line.190"></a>
<span class="sourceLineNo">191</span>                values.put(param.getName(), true);<a name="line.191"></a>
<span class="sourceLineNo">192</span>            needSpace = !this.params.isEmpty() &amp;&amp; this.params.get(0).getMin() &gt; 0;<a name="line.192"></a>
<span class="sourceLineNo">193</span>        }<a name="line.193"></a>
<span class="sourceLineNo">194</span><a name="line.194"></a>
<span class="sourceLineNo">195</span>        // Next parse parameters<a name="line.195"></a>
<span class="sourceLineNo">196</span>        for (Param param : this.params) {<a name="line.196"></a>
<span class="sourceLineNo">197</span>            final ArrayList&lt;Object&gt; paramValues = new ArrayList&lt;&gt;();<a name="line.197"></a>
<span class="sourceLineNo">198</span>            final String typeName = param.getTypeName();<a name="line.198"></a>
<span class="sourceLineNo">199</span>            final Parser&lt;?&gt; parser = param.getParser();<a name="line.199"></a>
<span class="sourceLineNo">200</span>            while (paramValues.size() &lt; param.getMax()) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>                new SpaceParser(needSpace).parse(ctx, complete);<a name="line.201"></a>
<span class="sourceLineNo">202</span>                needSpace = false;<a name="line.202"></a>
<span class="sourceLineNo">203</span>                if (!ctx.getInput().matches("(?s)^[^\\s;].*$")) {<a name="line.203"></a>
<span class="sourceLineNo">204</span>                    if (complete) {<a name="line.204"></a>
<span class="sourceLineNo">205</span>                        parser.parse(session, new ParseContext(""), true);      // calculate completions from empty string<a name="line.205"></a>
<span class="sourceLineNo">206</span>                        throw new ParseException(ctx, "");                      // should never get here<a name="line.206"></a>
<span class="sourceLineNo">207</span>                    }<a name="line.207"></a>
<span class="sourceLineNo">208</span>                    break;<a name="line.208"></a>
<span class="sourceLineNo">209</span>                }<a name="line.209"></a>
<span class="sourceLineNo">210</span>                paramValues.add(parser.parse(session, ctx, complete));<a name="line.210"></a>
<span class="sourceLineNo">211</span>                needSpace = paramValues.size() &lt; param.getMin();<a name="line.211"></a>
<span class="sourceLineNo">212</span>            }<a name="line.212"></a>
<span class="sourceLineNo">213</span>            if (paramValues.size() &lt; param.getMin()) {<a name="line.213"></a>
<span class="sourceLineNo">214</span>                final ParseException e = new ParseException(ctx, "missing `" + param.getName() + "' parameter");<a name="line.214"></a>
<span class="sourceLineNo">215</span>                if (complete) {<a name="line.215"></a>
<span class="sourceLineNo">216</span>                    try {<a name="line.216"></a>
<span class="sourceLineNo">217</span>                        parser.parse(session, new ParseContext(""), true);<a name="line.217"></a>
<span class="sourceLineNo">218</span>                    } catch (ParseException e2) {<a name="line.218"></a>
<span class="sourceLineNo">219</span>                        e.addCompletions(e2.getCompletions());<a name="line.219"></a>
<span class="sourceLineNo">220</span>                    }<a name="line.220"></a>
<span class="sourceLineNo">221</span>                }<a name="line.221"></a>
<span class="sourceLineNo">222</span>                throw e;<a name="line.222"></a>
<span class="sourceLineNo">223</span>            }<a name="line.223"></a>
<span class="sourceLineNo">224</span>            if (param.getMax() &gt; 1)<a name="line.224"></a>
<span class="sourceLineNo">225</span>                values.put(param.getName(), Arrays.asList(paramValues.toArray()));<a name="line.225"></a>
<span class="sourceLineNo">226</span>            else if (!paramValues.isEmpty())<a name="line.226"></a>
<span class="sourceLineNo">227</span>                values.put(param.getName(), paramValues.get(0));<a name="line.227"></a>
<span class="sourceLineNo">228</span>        }<a name="line.228"></a>
<span class="sourceLineNo">229</span><a name="line.229"></a>
<span class="sourceLineNo">230</span>        // Check for trailing garbage<a name="line.230"></a>
<span class="sourceLineNo">231</span>        new SpaceParser().parse(ctx, complete);<a name="line.231"></a>
<span class="sourceLineNo">232</span>        if (!ctx.getInput().matches("(?s)^(;.*)?$"))<a name="line.232"></a>
<span class="sourceLineNo">233</span>            throw new ParseException(ctx);<a name="line.233"></a>
<span class="sourceLineNo">234</span><a name="line.234"></a>
<span class="sourceLineNo">235</span>        // Done<a name="line.235"></a>
<span class="sourceLineNo">236</span>        return values;<a name="line.236"></a>
<span class="sourceLineNo">237</span>    }<a name="line.237"></a>
<span class="sourceLineNo">238</span><a name="line.238"></a>
<span class="sourceLineNo">239</span>// Param<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span>    /**<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * Represents one parsed parameter specification.<a name="line.242"></a>
<span class="sourceLineNo">243</span>     *<a name="line.243"></a>
<span class="sourceLineNo">244</span>     * &lt;p&gt;<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * {@link String} form is {@code -flag:name:type}, where the {@code -flag} is optional and indicates<a name="line.245"></a>
<span class="sourceLineNo">246</span>     * an option flag, {@code name} is the name of the flag or parameter, and {@code type} is optional as well:<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * if missing, it indicates either an argumment-less option flag or a "word" type ({@link String} that is a<a name="line.247"></a>
<span class="sourceLineNo">248</span>     * sequence of one or more non-whitespace characters). Otherwise {@code type} is the name of the parameter type.<a name="line.248"></a>
<span class="sourceLineNo">249</span>     * &lt;/p&gt;<a name="line.249"></a>
<span class="sourceLineNo">250</span>     *<a name="line.250"></a>
<span class="sourceLineNo">251</span>     * &lt;p&gt;<a name="line.251"></a>
<span class="sourceLineNo">252</span>     * Non-option parameters may have a {@code ?} suffix if optional,<a name="line.252"></a>
<span class="sourceLineNo">253</span>     * or a {@code +}, or {@code *} suffix if repeatable, in which case the result is a {@link List}.<a name="line.253"></a>
<span class="sourceLineNo">254</span>     * &lt;/p&gt;<a name="line.254"></a>
<span class="sourceLineNo">255</span>     *<a name="line.255"></a>
<span class="sourceLineNo">256</span>     * &lt;p&gt;<a name="line.256"></a>
<span class="sourceLineNo">257</span>     * Spec string syntax examples:<a name="line.257"></a>
<span class="sourceLineNo">258</span>     * &lt;ul&gt;<a name="line.258"></a>
<span class="sourceLineNo">259</span>     *  &lt;li&gt;&lt;code&gt;-v:foo&lt;/code&gt; - boolean flag named {@code foo}&lt;/li&gt;<a name="line.259"></a>
<span class="sourceLineNo">260</span>     *  &lt;li&gt;&lt;code&gt;-v:foo:int&lt;/code&gt; - integer flag named {@code foo}&lt;/li&gt;<a name="line.260"></a>
<span class="sourceLineNo">261</span>     *  &lt;li&gt;&lt;code&gt;foo&lt;/code&gt; - string (word) parameter&lt;/li&gt;<a name="line.261"></a>
<span class="sourceLineNo">262</span>     *  &lt;li&gt;&lt;code&gt;foo:int&lt;/code&gt; - {@code int} parameter&lt;/li&gt;<a name="line.262"></a>
<span class="sourceLineNo">263</span>     *  &lt;li&gt;&lt;code&gt;foo?&lt;/code&gt; - optional final parameter&lt;/li&gt;<a name="line.263"></a>
<span class="sourceLineNo">264</span>     *  &lt;li&gt;&lt;code&gt;foo*&lt;/code&gt; - array of zero or more final parameters&lt;/li&gt;<a name="line.264"></a>
<span class="sourceLineNo">265</span>     *  &lt;li&gt;&lt;code&gt;foo+&lt;/code&gt; - array of one or more final parameters&lt;/li&gt;<a name="line.265"></a>
<span class="sourceLineNo">266</span>     *  &lt;li&gt;&lt;code&gt;foo:int+&lt;/code&gt; - array of one or more final {@code int} parameters&lt;/li&gt;<a name="line.266"></a>
<span class="sourceLineNo">267</span>     * &lt;/ul&gt;<a name="line.267"></a>
<span class="sourceLineNo">268</span>     */<a name="line.268"></a>
<span class="sourceLineNo">269</span>    public class Param {<a name="line.269"></a>
<span class="sourceLineNo">270</span><a name="line.270"></a>
<span class="sourceLineNo">271</span>        private final String optionFlag;<a name="line.271"></a>
<span class="sourceLineNo">272</span>        private final String name;<a name="line.272"></a>
<span class="sourceLineNo">273</span>        private final String typeName;<a name="line.273"></a>
<span class="sourceLineNo">274</span>        private final Parser&lt;?&gt; parser;<a name="line.274"></a>
<span class="sourceLineNo">275</span>        private final int min;<a name="line.275"></a>
<span class="sourceLineNo">276</span>        private final int max;<a name="line.276"></a>
<span class="sourceLineNo">277</span><a name="line.277"></a>
<span class="sourceLineNo">278</span>        public Param(String spec) {<a name="line.278"></a>
<span class="sourceLineNo">279</span><a name="line.279"></a>
<span class="sourceLineNo">280</span>            // Sanity check<a name="line.280"></a>
<span class="sourceLineNo">281</span>            if (spec == null)<a name="line.281"></a>
<span class="sourceLineNo">282</span>                throw new IllegalArgumentException("null spec");<a name="line.282"></a>
<span class="sourceLineNo">283</span><a name="line.283"></a>
<span class="sourceLineNo">284</span>            // Apply pattern<a name="line.284"></a>
<span class="sourceLineNo">285</span>            final Pattern pattern = Pattern.compile("((-[^\\s:]+):)?([^-][^\\s:?+*]*)(:([^\\s?+*]+))?([?+*])?");<a name="line.285"></a>
<span class="sourceLineNo">286</span>            final Matcher matcher = pattern.matcher(spec);<a name="line.286"></a>
<span class="sourceLineNo">287</span>            if (!matcher.matches())<a name="line.287"></a>
<span class="sourceLineNo">288</span>                throw new IllegalArgumentException("invalid parameter spec `" + spec + "'");<a name="line.288"></a>
<span class="sourceLineNo">289</span><a name="line.289"></a>
<span class="sourceLineNo">290</span>            // Get components<a name="line.290"></a>
<span class="sourceLineNo">291</span>            this.optionFlag = matcher.group(2);<a name="line.291"></a>
<span class="sourceLineNo">292</span>            this.name = matcher.group(3);<a name="line.292"></a>
<span class="sourceLineNo">293</span>            this.typeName = matcher.group(5);<a name="line.293"></a>
<span class="sourceLineNo">294</span>            final String repeat = matcher.group(6);<a name="line.294"></a>
<span class="sourceLineNo">295</span>            if (repeat == null) {<a name="line.295"></a>
<span class="sourceLineNo">296</span>                this.min = 1;<a name="line.296"></a>
<span class="sourceLineNo">297</span>                this.max = 1;<a name="line.297"></a>
<span class="sourceLineNo">298</span>            } else if (repeat.charAt(0) == '?') {<a name="line.298"></a>
<span class="sourceLineNo">299</span>                this.min = 0;<a name="line.299"></a>
<span class="sourceLineNo">300</span>                this.max = 1;<a name="line.300"></a>
<span class="sourceLineNo">301</span>            } else if (repeat.charAt(0) == '*') {<a name="line.301"></a>
<span class="sourceLineNo">302</span>                this.min = 0;<a name="line.302"></a>
<span class="sourceLineNo">303</span>                this.max = Integer.MAX_VALUE;<a name="line.303"></a>
<span class="sourceLineNo">304</span>            } else if (repeat.charAt(0) == '+') {<a name="line.304"></a>
<span class="sourceLineNo">305</span>                this.min = 1;<a name="line.305"></a>
<span class="sourceLineNo">306</span>                this.max = Integer.MAX_VALUE;<a name="line.306"></a>
<span class="sourceLineNo">307</span>            } else<a name="line.307"></a>
<span class="sourceLineNo">308</span>                throw new IllegalArgumentException("invalid parameter spec `" + spec + "'");<a name="line.308"></a>
<span class="sourceLineNo">309</span><a name="line.309"></a>
<span class="sourceLineNo">310</span>            // Get parser<a name="line.310"></a>
<span class="sourceLineNo">311</span>            this.parser = this.typeName != null ?<a name="line.311"></a>
<span class="sourceLineNo">312</span>              ParamParser.this.getParser(typeName) : !this.isOption() ? new WordParser("parameter") : null;<a name="line.312"></a>
<span class="sourceLineNo">313</span>        }<a name="line.313"></a>
<span class="sourceLineNo">314</span><a name="line.314"></a>
<span class="sourceLineNo">315</span>        public String getOptionFlag() {<a name="line.315"></a>
<span class="sourceLineNo">316</span>            return this.optionFlag;<a name="line.316"></a>
<span class="sourceLineNo">317</span>        }<a name="line.317"></a>
<span class="sourceLineNo">318</span><a name="line.318"></a>
<span class="sourceLineNo">319</span>        public boolean isOption() {<a name="line.319"></a>
<span class="sourceLineNo">320</span>            return this.optionFlag != null;<a name="line.320"></a>
<span class="sourceLineNo">321</span>        }<a name="line.321"></a>
<span class="sourceLineNo">322</span><a name="line.322"></a>
<span class="sourceLineNo">323</span>        public String getName() {<a name="line.323"></a>
<span class="sourceLineNo">324</span>            return this.name;<a name="line.324"></a>
<span class="sourceLineNo">325</span>        }<a name="line.325"></a>
<span class="sourceLineNo">326</span><a name="line.326"></a>
<span class="sourceLineNo">327</span>        public String getTypeName() {<a name="line.327"></a>
<span class="sourceLineNo">328</span>            return this.typeName;<a name="line.328"></a>
<span class="sourceLineNo">329</span>        }<a name="line.329"></a>
<span class="sourceLineNo">330</span><a name="line.330"></a>
<span class="sourceLineNo">331</span>        public int getMin() {<a name="line.331"></a>
<span class="sourceLineNo">332</span>            return this.min;<a name="line.332"></a>
<span class="sourceLineNo">333</span>        }<a name="line.333"></a>
<span class="sourceLineNo">334</span><a name="line.334"></a>
<span class="sourceLineNo">335</span>        public int getMax() {<a name="line.335"></a>
<span class="sourceLineNo">336</span>            return this.max;<a name="line.336"></a>
<span class="sourceLineNo">337</span>        }<a name="line.337"></a>
<span class="sourceLineNo">338</span><a name="line.338"></a>
<span class="sourceLineNo">339</span>        public Parser&lt;?&gt; getParser() {<a name="line.339"></a>
<span class="sourceLineNo">340</span>            return this.parser;<a name="line.340"></a>
<span class="sourceLineNo">341</span>        }<a name="line.341"></a>
<span class="sourceLineNo">342</span><a name="line.342"></a>
<span class="sourceLineNo">343</span>        public String toString() {<a name="line.343"></a>
<span class="sourceLineNo">344</span>            return (this.optionFlag != null ? this.optionFlag + ":" : "")<a name="line.344"></a>
<span class="sourceLineNo">345</span>              + this.name<a name="line.345"></a>
<span class="sourceLineNo">346</span>              + (this.typeName != null ? ":" + this.typeName : "")<a name="line.346"></a>
<span class="sourceLineNo">347</span>              + (this.min == 0 &amp;&amp; this.max == 1 ? "?" :<a name="line.347"></a>
<span class="sourceLineNo">348</span>               this.min == 0 &amp;&amp; this.max == Integer.MAX_VALUE ? "*" :<a name="line.348"></a>
<span class="sourceLineNo">349</span>               this.min == 1 &amp;&amp; this.max == Integer.MAX_VALUE ? "+" : "");<a name="line.349"></a>
<span class="sourceLineNo">350</span>        }<a name="line.350"></a>
<span class="sourceLineNo">351</span>    }<a name="line.351"></a>
<span class="sourceLineNo">352</span>}<a name="line.352"></a>
<span class="sourceLineNo">353</span><a name="line.353"></a>




























































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